Update RestClientSsl to support ClientHttpRequestFactorySettings

Prior to this commit, RestClientSsl always used the
default settings from ClientHttpRequestFactorySettings, overriding any
user-defined settings (e.g., HttpClientProperties).

With this commit, RestClientSsl now respects and uses
ClientHttpRequestFactorySettings when they are provided.

See gh-44979

Signed-off-by: Dmytro Nosan <dimanosan@gmail.com>

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/client/AutoConfiguredRestClientSsl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,11 +34,14 @@ class AutoConfiguredRestClientSsl implements RestClientSsl {
 
 	private final ClientHttpRequestFactoryBuilder<?> clientHttpRequestFactoryBuilder;
 
+	private final ClientHttpRequestFactorySettings clientHttpRequestFactorySettings;
+
 	private final SslBundles sslBundles;
 
 	AutoConfiguredRestClientSsl(ClientHttpRequestFactoryBuilder<?> clientHttpRequestFactoryBuilder,
-			SslBundles sslBundles) {
+			ClientHttpRequestFactorySettings clientHttpRequestFactorySettings, SslBundles sslBundles) {
 		this.clientHttpRequestFactoryBuilder = clientHttpRequestFactoryBuilder;
+		this.clientHttpRequestFactorySettings = clientHttpRequestFactorySettings;
 		this.sslBundles = sslBundles;
 	}
 
@@ -50,7 +53,7 @@ class AutoConfiguredRestClientSsl implements RestClientSsl {
 	@Override
 	public Consumer<RestClient.Builder> fromBundle(SslBundle bundle) {
 		return (builder) -> {
-			ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.ofSslBundle(bundle);
+			ClientHttpRequestFactorySettings settings = this.clientHttpRequestFactorySettings.withSslBundle(bundle);
 			ClientHttpRequestFactory requestFactory = this.clientHttpRequestFactoryBuilder.build(settings);
 			builder.requestFactory(requestFactory);
 		};

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/client/RestClientAutoConfiguration.java

@@ -68,9 +68,12 @@ public class RestClientAutoConfiguration {
 	@ConditionalOnMissingBean(RestClientSsl.class)
 	@ConditionalOnBean(SslBundles.class)
 	AutoConfiguredRestClientSsl restClientSsl(
-			ObjectProvider<ClientHttpRequestFactoryBuilder<?>> clientHttpRequestFactoryBuilder, SslBundles sslBundles) {
+			ObjectProvider<ClientHttpRequestFactoryBuilder<?>> clientHttpRequestFactoryBuilder,
+			ObjectProvider<ClientHttpRequestFactorySettings> clientHttpRequestFactorySettings, SslBundles sslBundles) {
 		return new AutoConfiguredRestClientSsl(
-				clientHttpRequestFactoryBuilder.getIfAvailable(ClientHttpRequestFactoryBuilder::detect), sslBundles);
+				clientHttpRequestFactoryBuilder.getIfAvailable(ClientHttpRequestFactoryBuilder::detect),
+				clientHttpRequestFactorySettings.getIfAvailable(ClientHttpRequestFactorySettings::defaults),
+				sslBundles);
 	}
 
 	@Bean

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/client/AutoConfiguredRestClientSslTests.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2012-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure.web.client;
+
+import java.time.Duration;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder;
+import org.springframework.boot.http.client.ClientHttpRequestFactorySettings;
+import org.springframework.boot.http.client.ClientHttpRequestFactorySettings.Redirects;
+import org.springframework.boot.ssl.SslBundle;
+import org.springframework.boot.ssl.SslBundles;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestClient.Builder;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link AutoConfiguredRestClientSsl}.
+ *
+ * @author Dmytro Nosan
+ */
+@ExtendWith(MockitoExtension.class)
+class AutoConfiguredRestClientSslTests {
+
+	private final ClientHttpRequestFactorySettings clientHttpRequestFactorySettings = ClientHttpRequestFactorySettings
+		.ofSslBundle(mock(SslBundle.class, "Default SslBundle"))
+		.withRedirects(Redirects.DONT_FOLLOW)
+		.withReadTimeout(Duration.ofSeconds(10))
+		.withConnectTimeout(Duration.ofSeconds(30));
+
+	@Mock
+	private SslBundles sslBundles;
+
+	@Mock
+	private ClientHttpRequestFactoryBuilder<ClientHttpRequestFactory> clientHttpRequestFactoryBuilder;
+
+	@Mock
+	private ClientHttpRequestFactory clientHttpRequestFactory;
+
+	@Test
+	void shouldConfigureRestClientUsingBundleName() {
+		String bundleName = "test";
+		SslBundle sslBundle = mock(SslBundle.class, "SslBundle named '%s'".formatted(bundleName));
+
+		given(this.sslBundles.getBundle(bundleName)).willReturn(sslBundle);
+		given(this.clientHttpRequestFactoryBuilder
+			.build(this.clientHttpRequestFactorySettings.withSslBundle(sslBundle)))
+			.willReturn(this.clientHttpRequestFactory);
+
+		assertThat(applySslBundle((restClientSsl) -> restClientSsl.fromBundle(bundleName)))
+			.hasFieldOrPropertyWithValue("clientRequestFactory", this.clientHttpRequestFactory);
+
+	}
+
+	@Test
+	void shouldConfigureRestClientUsingBundle() {
+		SslBundle sslBundle = mock(SslBundle.class, "Custom SslBundle");
+
+		given(this.clientHttpRequestFactoryBuilder
+			.build(this.clientHttpRequestFactorySettings.withSslBundle(sslBundle)))
+			.willReturn(this.clientHttpRequestFactory);
+
+		assertThat(applySslBundle((restClientSsl) -> restClientSsl.fromBundle(sslBundle)))
+			.hasFieldOrPropertyWithValue("clientRequestFactory", this.clientHttpRequestFactory);
+	}
+
+	private RestClient applySslBundle(Function<RestClientSsl, Consumer<Builder>> applySslBundle) {
+		Builder builder = RestClient.builder();
+		applySslBundle.apply(getRestClientSsl()).accept(builder);
+		return builder.build();
+	}
+
+	private RestClientSsl getRestClientSsl() {
+		return new AutoConfiguredRestClientSsl(this.clientHttpRequestFactoryBuilder,
+				this.clientHttpRequestFactorySettings, this.sslBundles);
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/client/RestClientAutoConfigurationTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.autoconfigure.web.client;
 
+import java.time.Duration;
 import java.util.List;
 
 import org.junit.jupiter.api.Test;
@@ -27,6 +28,7 @@ import org.springframework.boot.autoconfigure.http.client.HttpClientAutoConfigur
 import org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder;
 import org.springframework.boot.http.client.ClientHttpRequestFactorySettings;
 import org.springframework.boot.http.client.ClientHttpRequestFactorySettings.Redirects;
+import org.springframework.boot.ssl.SslBundle;
 import org.springframework.boot.ssl.SslBundles;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.web.client.RestClientCustomizer;
@@ -66,9 +68,43 @@ class RestClientAutoConfigurationTests {
 	}
 
 	@Test
-	void shouldSupplyRestClientSslIfSslBundlesIsThere() {
-		this.contextRunner.withBean(SslBundles.class, () -> mock(SslBundles.class))
-			.run((context) -> assertThat(context).hasSingleBean(RestClientSsl.class));
+	void shouldSupplyRestClientSslIfSslBundlesIsThereWithCustomHttpSettingsAndBuilder() {
+		SslBundles sslBundles = mock(SslBundles.class);
+		ClientHttpRequestFactorySettings clientHttpRequestFactorySettings = ClientHttpRequestFactorySettings.defaults()
+			.withRedirects(Redirects.DONT_FOLLOW)
+			.withConnectTimeout(Duration.ofHours(1))
+			.withReadTimeout(Duration.ofDays(1))
+			.withSslBundle(mock(SslBundle.class));
+		ClientHttpRequestFactoryBuilder<?> clientHttpRequestFactoryBuilder = mock(
+				ClientHttpRequestFactoryBuilder.class);
+		this.contextRunner.withBean(SslBundles.class, () -> sslBundles)
+			.withBean(ClientHttpRequestFactorySettings.class, () -> clientHttpRequestFactorySettings)
+			.withBean(ClientHttpRequestFactoryBuilder.class, () -> clientHttpRequestFactoryBuilder)
+			.run((context) -> {
+				assertThat(context).hasSingleBean(RestClientSsl.class);
+				RestClientSsl restClientSsl = context.getBean(RestClientSsl.class);
+				assertThat(restClientSsl).hasFieldOrPropertyWithValue("sslBundles", sslBundles);
+				assertThat(restClientSsl).hasFieldOrPropertyWithValue("clientHttpRequestFactoryBuilder",
+						clientHttpRequestFactoryBuilder);
+				assertThat(restClientSsl).hasFieldOrPropertyWithValue("clientHttpRequestFactorySettings",
+						clientHttpRequestFactorySettings);
+			});
+	}
+
+	@Test
+	void shouldSupplyRestClientSslIfSslBundlesIsThereWithAutoConfiguredHttpSettingsAndBuilder() {
+		SslBundles sslBundles = mock(SslBundles.class);
+		this.contextRunner.withBean(SslBundles.class, () -> sslBundles).run((context) -> {
+			assertThat(context).hasSingleBean(RestClientSsl.class)
+				.hasSingleBean(ClientHttpRequestFactorySettings.class)
+				.hasSingleBean(ClientHttpRequestFactoryBuilder.class);
+			RestClientSsl restClientSsl = context.getBean(RestClientSsl.class);
+			assertThat(restClientSsl).hasFieldOrPropertyWithValue("sslBundles", sslBundles);
+			assertThat(restClientSsl).hasFieldOrPropertyWithValue("clientHttpRequestFactoryBuilder",
+					context.getBean(ClientHttpRequestFactoryBuilder.class));
+			assertThat(restClientSsl).hasFieldOrPropertyWithValue("clientHttpRequestFactorySettings",
+					context.getBean(ClientHttpRequestFactorySettings.class));
+		});
 	}
 
 	@Test